Circuit Operation

HEADLIGHTS
Voltage is applied to the Light Switch at all times from Exterior Lighting Fuse 60 amp. When the Headlight Switch is turned "ON," voltage is applied to the High and Low Beam Circuits through the Headlight Dimmer Switch.

At the same time, this voltage is applied to the Headlight Door Motor Assemblies, which allow the doors to open.

When using the High Beams, a voltage is sent to the Central Control Module (CCM), which in turn applies ground to one side of the "High Beam" indicator bulb, causing the bulb to illuminate.

FOG LIGHTS
With the Light Switch in "HEAD" or "PARK," voltage is applied to one side of the Fog Light Switch. When the Fog Light Switch is closed, voltage is applied to one side of the Fog Light Relay Coil, energizing the relay (the other side of the coil is grounded through the High Beam Filament of the Headlights).

When energized, the normally open contacts of the Fog Light Relay close, allowing voltage to be applied to the Fog Lights.

When the High Beams are activated, current flow to ground is interrupted by opposing battery voltage from the Headlight Dimmer Switch, de-energizing the relay and turning off the Fog Lights.